Knowledge of the use of submersible pumps
Submersible pump in the use of frequent failure, many of which are due to the use of stainless steel submersible pump, caused by improper maintenance. Submersible pump in the use of the maintenance process must pay attention to the following questions.
1, submersible pump can not be dehydrated operation. Under anhydrous conditions, the test run time shall not exceed 5 minutes. In the pumping process, if the water level continues to decline, must pay attention to not allow the pump to work out of the water.
2, submersible pump can not be started immediately after the shutdown, must wait for the water in the tube after the return flow can be started. If you can not start after the water, should be immediately shut down to identify the cause, to be excluded.
3, different types of submersible pump, should be used in accordance with the provisions of the head, supporting the rubber pipe, metal pipe or canvas pipe diameter should be in line with the technical requirements.
4, submersible pump into the water or the water, must hold "lug" on the ropes, never pull the cable of korah. To carry, disassemble or repair, should be cut off the power supply.
The diving depth of 5, submersible pump is generally 0.5 to 3 meters, the submersible pump into the water, the vertical lifting, not lying, not stuck in the mud.
6, submersible pump for frequent starting, shall not be used for irrigation and drainage in high sediment concentration water or mud water. When using the pump can be used outside the bamboo net or barbed wire mesh to prevent the water in the water to prevent clogging submersible pump grid or stuck pump impeller.
7, after the boot, if there is a reversal of the impeller (at this time a large amount of water is reduced or not), should be immediately shut down, replace the cable in the three-phase core wire of any two phases, so that the flow of water. In the work should be specially assigned to take care of, found abnormalities should immediately stop inspection.
8, submersible pump should be used 25/330 - DFA type automatic air circuit breaker as control equipment. In the absence of such a switch, can also be used three-phase knife switch, but the electric fuse shall be installed on 6 amperes.
9, the power supply shall be selected, if the pump power and the use of lots of short distance wire cross-sectional area of cable should be increased, the joint should be less as far as possible, to ensure the normal use of the voltage in volts between 342418. In order to ensure safety, a metal rod with a length of 1 meters or more in a wet ground near a power supply or a water pump is used as a ground wire.